Computing and mathematics legend Stephen Wolfram is worried about bigger problems than climate change or overpopulation. He just joined the Lifeboat Institute, a think tank devoted to ways of protecting humanity from deadly nanoweapons and rogue artificial intelligences.

Computing and mathematics legend Stephen Wolfram is worried about bigger problems than climate change or overpopulation. He just joined the Lifeboat Foundation, a think tank devoted to ways of protecting humanity from deadly nanoweapons and rogue artificial intelligences.

Stephen Wolfram is a well-known figure in the sciences thanks to genius inventions like the math problem-solving software Mathematica. Now he's in the news again for a very different reason: He's trying to reinvent web search by making a smart "fact computer" engine.